pip3 source change to improve speed

Temporary source change:
pip3 install package name -i source url

List of domestic sources
Tsinghua University https://pypi.tuna.tsinghua.edu.cn/simple/

Alibaba Cloud http://mirrors.aliyun.com/pypi/simple/

University of Science and Technology of China https://pypi.mirrors.ustc.edu.cn/simple/

douban http://pypi.douban.com/simple/

University of Science and Technology of China http://pypi.mirrors.ustc.edu.cn/simple/